Bushing-insulator terminal



Nov. 16 1926. 1,607,424

A. o. AUSTIN BUSHING IINSULA'IOR TERMINAL Filed August 2, 1922 @Houmg Patented Nov. 16, 1926.

UNITED STATES 1 1,607,424 PATENT OFFICE.

ARTHUR O. AUSTIN, OF BARBERTON, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

THE 01:10 BRASS COMPANY, or MANSFIELD,

SEY.

OHIO, A co'RPoBArIoN or NEW JER- ,IBUSHING-INSULATOR TERMINAL.

Application filed August 2, 1922., Serial No. 579,138.

This invention relates to means for securing the conductor at the end of an insulator bushing t the bushing itself and to the conductor lead extending away-from the bush 5 ing. The invention has for its object the provision of a terminal which shall efiectively close the end of the bushing, which shall provide a low resistance contact be- I tween the conductor and the lead wire, which L shall be convenient to install and which shall be of improved'construction and operation.

The invention is exemplified in the combination and-arrangement of parts shown in the accompanying drawings and described in the following specification and it is morev particularly pointed out in the appended claims.

In the drawing, numeral 10 designates the outer end of a dielectric bushing such as is used for insulating conductors from transformer housings, switch housings, roofs, walls or other devices through which a conductor passes and fromwhich it is insulated. Conductor (11) extends through the bushing (10) and isprovided With a terminal flug (12) soldered, brazed or otherwise secured to the end of the conductor. A cap (13) is secured to the end of the bushing (10) by cement (14) in a well known; manner. A flange (15) extends upwardly from the cap (13) and is provided with a tapered socket (16) for receiving a correspondingly tapered .or conical bushing (17). The bushing ,(17) is screwed onto a threaded portion (18) at the end of the terminal lug (12). An angular socket (19) is provided in the cap (13) for receiving a correspondingly shaped portion (20) at the lower end of the lug 12) by means of which the lug (12) and the conductor (11%are held against rotation in the cap (13);. he outer end of the lug 12) is provided with a tapped opening (21) for receiving an eye or other connectionffor a cord or line by means of which the conductor (11) maybe drawn through the bushing (10) and the o ening in the flange (15). After the lug 12 is brought into the opening in the flange 15) the conical-bushing (17) is screwed into conductor in position in the bushing. A lead wire (22) is provided with a terminal member (23) properly secured to the end'of the lead wire and having a contact face (24) place on its threaded end (18) to hold the f for engaging the end ofthe conductor lug (12). The face (24) is firmly clamped against the end of the conductor lug (12) to form electrical contact therewith by means of a clamping nut (25) having right and left hand threads (26) and (27) for engaging corresponding threaded portions on the flange (15) and the contact member(23) respectively. The nut (25) isprovided with angular shoulders (28) for receiving a wrench or other tightening device by means of which the face (24') may be'firmly clam ed againstthe end of the conductor lug (12 This action not only brings the two abutting faces into close engagement, but presses the threads 18) of the conductor into close 7 contact with the thread in the bushing (17) and also forces the tapered surface of the cone (17) into close contact with the tapered surface (16) onthe flange (15).

The oppositely directed threads (26) and (27) operate against one another to drawtheir surfaces intoiclose contact, thus estabe lishing' electrical connections from the conductor (11), through the nut (25), bushing (17 and contacting threaded'surfaces' In this Way .a double path is provided for electrical current vbetween the conductors 1 (17) and (22) andthe contacting surfaces i are allunder .heavy pressure to assure low resistanceelectricalconnections The memher (23) ma be provided with a weathered szhi7e)ld (29) or protecting the threaded joint I claim: v

1. In a dielectric bushing having a conductor extendin therethru, a cap on said bushing, means or supporting said conduc-' tor on said cap at the end of said bushing, a conductor lead engaging the end of said conductor and a" clamping member'having o5 oppositely directed threaded engagements with said conductor lead and cap respectively for pressing said conductor and lead into contact with one another to provide electrical connections therebetween.

2. In a dielectric bushinghaving a conductor extending therethru, a fitting for said bushing having a seat therein for supporting the end of said conductor, a conductor lead, and a clamping nut having oppositely directed threaded engagement with said fitting and lead for pressing said lead into contact with said conductor.

4 through 3. In a dielectric bushing having a conductor extending therethru, a fitting for said bushing having a seat for supporting said conductor at the end of said bushing,

6 a conductor lead terminal having butt end engagement with said conductor, a clamping nut having right and left hand threads therein, said threads -meshing with corresponding threads on said fitting and ter- 10 minal member for pressing said terminal member against the end of said conductor and for holding said conductor in place in its seat.

4. In a dielectric bushing having a conductor extending therethru, a fitting for conductor and a .clamping nut having threaded engagement with said terminal member and fitting for clamping said terminal member against said conductor and for forcing said conical bushing closely into said seat.

5. In a dielectric bushing having a cap secured to the end thereof, a flange on said cap provided with a conical seat, a conductor extending through said bushing and having a reversely tapered portion conneoted therewith and fitting said seat, a conductor lead engaging the end of said conductor and means for clamping "said conductor lead against said conductor to force the tapered surface of said conductor into said seat.

6. In a dielectric bushing having an opening therethru, a cap fitted onto the end of said bushing,'a conductor extending thereof threaded, interfitting means between said conductor and cap for preventing relative rotation thereof, a tapered bushing threaded on the endof said conductor and seated in said cap, a lead conductor having said bushing and having the end ductor extending therethru, a cap on the end of said bushing having a tapered seat therein, interfitting means for preventing rotation, of said conductor in said cap, a lead conductor having contact with said first mentioned conductor and a right and left hand threaded nutfor pressing the contacting surfaces of said conductors tightly together without relative rotation thereof.

9. In a dielectric bushing'having a conductor extending therethru, a cap for said bushing, interfitting means for preventing relative rotation of said conductor and cap, said cap having a tapered seat therein, a conical bushing threaded on said conductor and fitted in said seat, a lead conductor terminal having butt end engagement with the end of said conductor, a nut having oppositely threaded engagement with said cap and lead conductor terminal for exerting pressure on the contact between said terminal and conductor, thusforcing said conical bushing in its seat and a weather shield for protecting the joint formed by said nut.

In testimony whereof I have signed my name to this specification on this 29th day of July, A. D. 1922. c

ARTHUR o. AUSTIN. 

